Pu Yanlan knew this was the elder wanting to impart knowledge about cultivation and hastily bowed respectfully before saying,
"Please impart your teachings, senior!"
Mu Tiangang nodded and said,
"In this world where there is Yang, there must also be Yin; where there is Yin, there must also be Yang. When heaven and earth first separated, and all things emerged from Chaos at the beginning, Yin and Yang were divided. People tend to regard Yang as good and Yin as evil without realizing that in this world, Yin and Yang complement each other, and neither can exist without the other...
He paused and then continued,
